INT 31H 0506H: Query Page Attributes

                                                    Compatibility: DPMI 1.0+ 
 Expects: AX     0506H
          ESI    memory block handle (as obtained via INT 31H 0504H)
          EBX    base offset of page(s) of interest
          ECX    number of pages
          ES:EDX address of buffer to receive returned information
          ──────────────────────────────────────────────────────────────────
 Returns: CF    NC (clear) if successful; else AX = DPMI Error Code
          ES:EDX buffer contained returned info
          ──────────────────────────────────────────────────────────────────
    Info: This obtains the information about one or more pages of linear
          memory allocated via INT 31H 0504H.

   ES:EDX on return, this buffer will be filled with ECX 16-bit values
          formatted as follows:
           1
          ┌5┬ - ┬7┬6┬5┬4┬3┬2┬1┬0┐
          │0 ... 0│m│a│f│w│ type│
          └─┴ - ┴─┴╥┴╥┴╥┴╥┴─┴─┴─┘ bit  mask
                   ║ ║ ║ ║ ╚═══╩═►0-2: 0007H 0=uncommitted; 1=committed
                   ║ ║ ║ ║                   2=mapped;3=unmapped;4-7 (res)
                   ║ ║ ║ ╚═══════►  3: 0008H 1=read/write; 0=read-only
                   ║ ║ ╚═════════►  4: 0010H 1=access flags are in 6-6
                   ║ ╚═══════════►  5: 0020H 1=page has been accessed
                   ╚═════════════►  6: 0040H 1=page has been modified

See Also: DPMI API
          INT 2fH: Multiplex Interrupt
          DOS Functions
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